21550120

素因数分解:

$2^3\times 5^1\times {\mathrm{83}}^1\times {\mathrm{6491}}^1$

素因数の和:6585

約数の個数: 32

約数和(自身を含む): 49079520

約数和(自身を除く): 27529400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 664, 830, 1660, 3320, 6491, 12982, 25964, 32455, 51928, 64910, 129820, 259640, 538753, 1077506, 2155012, 2693765, 4310024, 5387530, 10775060, 21550120]

約数ペア:

[(1, 21550120), (2, 10775060), (4, 5387530), (5, 4310024), (8, 2693765), (10, 2155012), (20, 1077506), (40, 538753), (83, 259640), (166, 129820), (332, 64910), (415, 51928), (664, 32455), (830, 25964), (1660, 12982), (3320, 6491)]